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VulnerabilityPublished Updated

CVE-2026-100368: alastairlundy CliInvoke.Specializations · OS Command Injection

Affects alastairlundy CliInvoke.SpecializationsSource CVE Database V5

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Not known to be exploited · CVSS 8.4 High · fixed in 2.8.5 : patch alastairlundy CliInvoke.Specializations soon.

Data as of 8 Nov 2026, 23:24 UTC

CVSS 3.1 base score
8.4High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 48% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2.8.5
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
alastairlundyCliInvoke.SpecializationsAffected
  • >=2.2.0 <=2.8.4
  • >=2.9.0 <=2.9.3
  • >=2.10.0 <=2.10.4
  • >=3.0.0-alpha.1 <=3.0.0-alpha.4
  • >=3.0.0-alpha.8 <=3.0.0-alpha.10
  • >=1.0.0-rc.1 <=1.6.1.1
Fixed in–
NuGetcliinvoke.specializationspkg:nuget/cliinvoke.specializationsOther threatsAffected
  • >=2.2.0 <=2.8.4
  • >=2.9.0 <=2.9.3
  • >=2.10.0 <=2.10.4
  • >=3.0.0-alpha.1 <=3.0.0-alpha.4
  • >=3.0.0-alpha.8 <=3.0.0-alpha.10
Fixed in–
NuGetalastairlundy.cliinvoke.specializationspkg:nuget/alastairlundy.cliinvoke.specializationsOther threatsAffected
  • >=1.0.0-rc.1 <=1.6.1.1
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available in CliInvoke.Specializations versions 2.8.5, 2.9.4, 2.10.5, 3.0.0-beta.1, and AlastairLundy.CliInvoke.Specializations version 2.0.2. Users should upgrade to these versions to remediate the vulnerability. For users unable to upgrade immediately, it is recommended to reject or remove double quotes from target paths and arguments. Additionally, for versions 2.2.0 through 2.9.2 and 3.0.0-alpha.1 through 3.0.0-alpha.4, reject shell metacharacters. Alternatively, bypass the PowerShell and Cmd wrappers and invoke target processes directly when handling untrusted input. No complete workaround exists without upgrading.

Description

CliInvoke is a .NET library for invoking command-line programs, and its `CliInvoke.Specializations` packages provide specialized wrappers for shells such as PowerShell and Windows Command Prompt. `CliInvoke.Specializations` versions 2.2.0 through 2.8.4, 2.9.0 through 2.9.3, 2.10.0 through 2.10.4, 3.0.0-alpha.1 through 3.0.0-alpha.4, and 3.0.0-alpha.8 through 3.0.0-alpha.10, as well as `AlastairLundy.CliInvoke.Specializations` versions 1.0.0-rc.1 through 1.6.1.1, contain an OS command injection vulnerability in their PowerShell and Cmd wrappers. The wrappers pass a caller-controlled target and arguments to `pwsh -Command` or `cmd /c` using a single `ProcessStartInfo.Arguments` string, allowing a double quote in untrusted input to break operating-system-level quoting and cause the shell to execute an additional command with the host process's privileges. The vulnerability is patched in `CliInvoke.Specializations` versions 2.8.5, 2.9.4, 2.10.5, and 3.0.0-beta.1, and in `AlastairLundy.CliInvoke.Specializations` version 2.0.2. No complete workaround is available; users unable to upgrade should reject or remove double quotes from target paths and arguments, additionally reject shell metacharacters in versions 2.2.0 through 2.9.2 and 3.0.0-alpha.1 through 3.0.0-alpha.4, or bypass the PowerShell and Cmd wrappers and invoke target processes directly when handling untrusted input.

References

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